Exploring Chemical Analysis
Exploring Chemical Analysis
5th Edition
ISBN: 9781429275033
Author: Daniel C. Harris
Publisher: Macmillan Higher Education
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Chapter 18, Problem 18.30P

(a)

Interpretation Introduction

Interpretation:

Value of molar absorptivity of blue product has to be calculated.

Concept Introduction:

Molar absorptivity is a coefficient that appears in Beers’ law. It measures the extent of light absorbed at a certain wavelength. Molar absorptivity is denoted by the symbol ε. SI unit for Molar absorptivity is M1cm1.

Expression to compute absorbance as per Beer’s law is as follows:

  A=εbc

Here,

ε denotes molar absorptivity of species capable to absorb in M1cm1.

b denotes path length in centimeters.

c denotes concentration or molarity of species capable to absorb.

A denotes absorbance.

T denotes transmittance.

(b)

Interpretation Introduction

Interpretation:

Weight percent of phosphorus has to be calculated.

Concept Introduction:

Formula to calculate weight percent is as follows:

  Weight percent=(Mass of PMass of sample)(100 %)

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